Email signatures are full of all the different ways you can get in touch with the sender. And if you follow this method, chances are that you won't be contacted. It's best to follow the "less is more" philosophy for signatures, says Fast Company.

Two communications experts—Melissa Cassera of Cassera Communications and Ron Cates of Constant Contact—were both of the opinion that it's best to include only one or two ways to get in touch with you. And of course, that should be whatever you are most likely to check and respond to.

"It's overwhelming," she says. Instead, give one or two of the best ways to reach you. You can even add a sentence letting the reader know the quickest way to reach you. For example, Cassera ends her emails with "Twitter is the quickest way to my heart," and she includes her ID.

Cates says that too much contact information comes across as desperate. It can also be confusing. "Unless you have a retail store or office, it doesn't make sense to put physical address in your signature," he says. "Include one or two social icons but not all of them. The more choices you offer, the less likely any of them will be clicked."

Cates also advises making everything "thumbable" for the small screen. Including just one or two contacts also has the advantage of being easy to click on a mobile phone without accidentally tapping the wrong link.